8 x 1 1/8 Phillips Bugle Head Coarse Thread Drywall Screw Black Phosphate Particle Board 20NCUP188 It has a 5/16-18 thread

It has a 5/16-18 thread size and is 1 1/4" long

These 10-8 x 1 1/2 Bugle Square Drive Coarse Thread Type 17 Point Deck Screws are made of 18-8 stainless steel

even under extreme vibration and torque

This 1/4-20 x 4 Carriage Bolt Fully Threaded Zinc is a high-quality fastener designed for a wide range of applications

marine projects

8 x 1 1/8 Phillips Bugle Head Coarse Thread Drywall Screw Black Phosphate Particle Board 20NCUP188 It has a 5/16-18 threadThese 8 x 1 1 8 inch Phillips bugle head coarse thread drywall screws are made of black phosphate particle board. They are designed for use in drywall applications and feature a bugle head that helps to countersink the screw into the material. The coarse thread provides a strong hold, and the black phosphate finish helps to resist corrosion. These screws are available in a variety of lengths and diameters to meet your specific needs.